AP0957 Effect of Antimony Oxide Additive on Characteristics of (SnO2)1-x(Sb2O3)x Composite Thin Films Synthesized by Pulsed-Laser Deposition

Abstract

Tin:antimony oxides composites have given great attention due to their unique properties and many application in various fields like optoelectronic devices, gas sensors. The synthesis and characterization of (SnO₂)_1-x(Sb₂O₃)_x was conducted in order to comprehend the structure and discuss the optical and dielectric properties of this composites. The x-ray showed that the prepared pure tin oxide thin film was had a polycrystalline structure and that the peaks were identical with the tetragonal phase while the peaks were identical with antimony oxide for x=0.1 to x=0.5. The average crystal size along the preferred level of growth of tin oxide as well as of antimony oxide showed non regular change by increasing of antimony oxide content. Optical measurements showed that the prepared films(SnO₂)_1-x(Sb₂O₃)_x  had a direct E_g^opt energy gap of 3.75 eV, which showed a  non- regular increasing to 3.95 eV with the increase of  antimony  oxide  content from x = 0.0 to x = 0.5. Dielectric and electrical impedance properties of (SnO₂)_1-x(Sb₂O₃)_x composites were studied over the frequency range from 1kHz to 200kHz. The results showed that the dielectric properties of (SnO₂)_1-x(Sb₂O₃)_x composites and showed significant dependence upon  frequency. The frequency dependence type of AC conductivity obeys the Jonscher’s power law.